/**
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 * 
 * Copyright 2012-2015 the original author or authors.
 */
package org.assertj.swing.keystroke;

import static java.util.Locale.setDefault;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.swing.keystroke.KeyStrokeLocale.ASSERTJ_SWING_KEYBOARD_LOCALE;

import java.awt.im.InputContext;
import java.util.Locale;

import org.junit.After;
import org.junit.Assume;
import org.junit.Before;
import org.junit.Test;

/**
 * Provides tests for {@link KeyStrokeLocale#get()}.
 * 
 * @author Christian Roesch
 */
public class KeyStrokeLocale_get_Test {
  private Locale originalLocale;
  private String originalProperty;

  @Before
  public void backupSettings() {
    originalLocale = Locale.getDefault();
    originalProperty = System.getProperty(ASSERTJ_SWING_KEYBOARD_LOCALE);
  }

  @After
  public void restoreSettings() {
    setDefault(originalLocale);
    setProperty(originalProperty);
  }

  @Test
  public void should_Return_Locale_From_Property_If_Set_To_German() {
    setProperty("de");

    KeyStrokeLocale.reloadFromSystemSettings();
    assertThat(KeyStrokeLocale.get()).isEqualTo(Locale.GERMAN);
  }

  @Test
  public void should_Return_Locale_From_Property_If_Set_To_Italian() {
    setProperty("it");

    KeyStrokeLocale.reloadFromSystemSettings();
    assertThat(KeyStrokeLocale.get()).isEqualTo(Locale.ITALIAN);
  }

  @Test
  public void should_Return_Locale_With_String_From_Property() {
    setProperty("abcde");

    KeyStrokeLocale.reloadFromSystemSettings();
    assertThat(KeyStrokeLocale.get()).isEqualTo(new Locale("abcde"));
  }

  @Test
  public void should_Return_Locale_From_Input_Context_If_Property_Is_Null() {
    Assume.assumeNotNull(InputContext.getInstance().getLocale());

    setProperty(null);
    setDefault(Locale.ITALIAN);

    KeyStrokeLocale.reloadFromSystemSettings();
    assertThat(KeyStrokeLocale.get()).isEqualTo(InputContext.getInstance().getLocale());
  }

  @Test
  public void should_Return_Default_Locale_If_Property_Is_Null_And_InputContext_Delivers_Null() {
    Assume.assumeTrue(InputContext.getInstance().getLocale() == null);

    setProperty(null);
    setDefault(Locale.ITALIAN);

    KeyStrokeLocale.reloadFromSystemSettings();
    assertThat(KeyStrokeLocale.get()).isEqualTo(Locale.ITALIAN);
  }

  private void setProperty(String value) {
    if (value == null) {
      System.clearProperty(ASSERTJ_SWING_KEYBOARD_LOCALE);
    } else {
      System.setProperty(ASSERTJ_SWING_KEYBOARD_LOCALE, value);
    }
  }
}